US20230283112A1 - Antenna module and wireless power transmission device having the same - Google Patents
Antenna module and wireless power transmission device having the same Download PDFInfo
- Publication number
- US20230283112A1 US20230283112A1 US18/173,304 US202318173304A US2023283112A1 US 20230283112 A1 US20230283112 A1 US 20230283112A1 US 202318173304 A US202318173304 A US 202318173304A US 2023283112 A1 US2023283112 A1 US 2023283112A1
- Authority
- US
- United States
- Prior art keywords
- turn
- coil pattern
- distance
- turns
- coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 title claims description 35
- 238000004891 communication Methods 0.000 claims description 105
- 239000000758 substrate Substances 0.000 description 40
- 239000004020 conductor Substances 0.000 description 31
- 230000002093 peripheral effect Effects 0.000 description 11
- 230000004048 modification Effects 0.000 description 9
- 238000012986 modification Methods 0.000 description 9
- 239000003990 capacitor Substances 0.000 description 7
- 239000004065 semiconductor Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 102100026397 ADP/ATP translocase 3 Human genes 0.000 description 5
- 102100032533 ADP/ATP translocase 1 Human genes 0.000 description 4
- 102100026396 ADP/ATP translocase 2 Human genes 0.000 description 4
- 101710102715 ADP/ATP translocase 3 Proteins 0.000 description 4
- 101000768061 Escherichia phage P1 Antirepressor protein 1 Proteins 0.000 description 4
- 101000796932 Homo sapiens ADP/ATP translocase 1 Proteins 0.000 description 4
- 101000718417 Homo sapiens ADP/ATP translocase 2 Proteins 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 101710148588 ADP,ATP carrier protein 2 Proteins 0.000 description 2
- 101710165307 ADP,ATP carrier protein 2, mitochondrial Proteins 0.000 description 2
- 101710102718 ADP/ATP translocase 2 Proteins 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 101000718437 Homo sapiens ADP/ATP translocase 3 Proteins 0.000 description 1
- -1 Polyethylene Terephthalate Polymers 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2804—Printed windings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/005—Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2804—Printed windings
- H01F2027/2809—Printed windings on stacked layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
- H01F27/366—Electric or magnetic shields or screens made of ferromagnetic material
Definitions
- the present disclosure relates to an antenna module and a wireless power transmission device having the same.
- An antenna module has a first coil pattern including at least first, second, and third turns.
- the first turn is positioned in the opening of the second turn, and the second turn is positioned in the opening of the third turn.
- the first and second turns each have an opening width larger in a first direction than in a second direction perpendicular to the first direction.
- a first distance between the first and second turns in the second direction is smaller than a second distance between the second and third turns in the second direction
- a third distance between the first and second turns in the first direction is smaller than the first distance
- a fourth distance between the second and third turns in the first direction is smaller than the second distance.
- the third turn has an opening width larger in the second direction than in the first direction.
- FIGS. 1 A and 1 B are schematic views for explaining the structure of an antenna module 1 according to one embodiment of the present disclosure, where FIG. 1 A is a schematic plan view, and FIG. 1 B is a schematic cross-sectional view taken along the line A-A illustrated in FIG. 1 A ;
- FIGS. 2 A to 2 C are schematic views illustrating a state where a smartphone S 1 is placed on the placement surface 3 of the housing 2 ;
- FIGS. 3 A to 3 C are schematic views illustrating a state where a smartphone S 2 is placed on the placement surface 3 of the housing 2 ;
- FIG. 4 A is a circuit diagram illustrating an example of connection relation for the wireless communication parts 4 to 6 ;
- FIG. 4 B is a circuit diagram illustrating another example of connection relation for the wireless communication parts 4 to 6 ;
- FIG. 5 is a schematic cross-sectional view for explaining the structure of the wireless communication part 4 ;
- FIG. 6 is a schematic plan view illustrating the pattern shape of the first coil pattern CP 1 ;
- FIG. 7 is a schematic plan view illustrating the pattern shape of a conductor pattern formed on the surface 21 of the second substrate 20 ;
- FIG. 8 is a schematic plan view illustrating the pattern shape of a conductor pattern formed on the surface 22 of the second substrate 20 ;
- FIG. 9 is a schematic cross-sectional view for explaining the structures of the wireless communication parts 5 and 6 ;
- FIG. 10 is a block diagram of a wireless power transmission device 90 using the antenna module 1 according to the present embodiment.
- FIG. 11 is a schematic plan view illustrating the pattern shape of the first coil pattern CP 1 according to a first modification.
- FIG. 12 is a schematic plan view illustrating the pattern shape of the first coil pattern CP 1 according to a second modification.
- An object of the present disclosure to provide an antenna module having a coil pattern achieving a wide communicable range in a predetermined direction while suppressing an increase in the number of turns.
- FIGS. 1 A and 1 B are schematic views for explaining the structure of an antenna module 1 according to one embodiment of the present disclosure.
- FIG. 1 A is a schematic plan view
- FIG. 1 B is a schematic cross-sectional view taken along the line A-A illustrated in FIG. 1 A .
- the antenna module 1 includes a housing 2 having a placement surface 3 for placing thereon a mobile communication device such as a smartphone and wireless communication parts 4 to 6 each disposed in the inner space of the housing 2 so as to overlap the placement surface 3 .
- the wireless communication part 4 is positioned at substantially the center of the housing 2 in the x-direction
- the wireless communication part 5 is positioned at one side of the housing 2 in the negative x-direction
- the wireless communication part 6 is positioned at the other side of the housing 2 in the positive x-direction.
- the wireless communication parts 4 to 6 do not overlap one another in the z-direction.
- the wireless communication part 4 has a structure in which a first substrate 10 , a second substrate 20 , and a magnetic sheet 30 are stacked.
- the first substrate 10 has thereon an antenna coil for NFC (Near Field communication)
- the second substrate 20 has thereon a power transmission coil for a wireless power transmission.
- the wireless communication part 4 has both a wireless communication function and a wireless power transmission function.
- the wireless communication parts 5 and 6 each only have a wireless communication function. Smartphones have various sizes from large to small sizes.
- the placement surface 3 of the antenna module 1 is designed to be wide so as to allow various sizes of smartphones to be placed thereon, so that the position of a smartphone placed on the placement surface 3 may shift in the x-direction of the placement surface 3 . Further, when the antenna module 1 is provided in a console inside a vehicle, a smartphone placed on the placement surface may shift in position due to vibration of the vehicle.
- the antenna module 1 according to the present embodiment can perform wireless communication and wireless power transmission even when a smartphone placed on the placement surface 3 shifts in position.
- FIGS. 2 A to 2 C are schematic views illustrating a state where a smartphone S 1 is placed on the placement surface 3 of the housing 2 .
- FIG. 2 A illustrates a state where the smartphone S 1 is placed at substantially the center of the placement surface 3 in the x-direction
- FIG. 2 B illustrates a state where the smartphone S 1 is placed offset to one side of the placement surface 3 in the negative x-direction
- FIG. 2 C illustrates a state where the smartphone S 1 is placed offset to the other side of the placement surface 3 in the positive x-direction.
- the smartphone S 1 illustrated in FIGS. 2 A to 2 C which has a long side in the x-direction and a short side in the y-direction, includes an antenna coil RX 1 for NFC and a power receiving coil RX 2 for wireless power transmission which are disposed at substantially the center thereof in the x-direction.
- an antenna coil RX 1 for NFC and a power receiving coil RX 2 for wireless power transmission which are disposed at substantially the center thereof in the x-direction.
- the positional relation between the wireless communication part 4 and the antenna and power receiving coils RX 1 and RX 2 of the smartphone S 1 in the x-direction changes depending on the x-direction position of the smartphone S 1 on the placement surface 3 , so that the wireless communication part 4 is designed to provide a wide range of coupling with the antenna and power receiving coils RX 1 and RX 2 in the x-direction.
- FIGS. 3 A to 3 C are schematic views illustrating a state where a smartphone S 2 is placed on the placement surface 3 of the housing 2 .
- FIG. 3 A illustrates a state where the smartphone S 2 is placed at substantially the center of the placement surface 3 in the x-direction
- FIG. 3 B illustrates a state where the smartphone S 2 is placed offset to one side of the placement surface 3 in the negative x-direction
- FIG. 3 C illustrates a state where the smartphone S 2 is placed offset to the other side of the placement surface 3 in the positive x-direction.
- the smartphone S 2 illustrated in FIGS. 3 A to 3 C which has a long side in the x-direction and a short side in the y-direction, includes the antenna coil RX 1 for NFC disposed at one side thereof in the x-direction and the power receiving coil RX 2 for wireless power transmission disposed at substantially the center thereof in the x-direction.
- the smartphone S 2 of such a type is placed on the placement surface 3 of the housing 2 , wireless power transmission can be performed using the wireless communication part 4 irrespective of the x-direction position of the smartphone S 2 on the placement surface 3 .
- the wireless communication part 5 is used, while when the smartphone S 2 is placed on the placement surface 3 such that the antenna coil RX 1 is disposed at the positive x-direction side (see FIG. 3 C ), the wireless communication part 6 is used.
- the wireless communication part 5 or 6 is used depending on the disposing direction of the smartphone S 2 .
- FIG. 4 A is a circuit diagram illustrating an example of connection relation for the wireless communication parts 4 to 6 .
- the antenna module 1 includes a semiconductor IC 7 for communication, and the wireless communication parts 4 to 6 are connected to a pair of signal wires 8 and 9 connected to the semiconductor IC 7 .
- the signal wires 8 and 9 are connected with an inductor Lemc and a capacitor Cemc which function as an EMC noise filter and capacitors Cs and Cp functioning as a matching circuit.
- a communication antenna ANT 1 constituted by the wireless communication part 4 and a communication antenna ANT 2 constituted by the wireless communication parts 5 and 6 are connected in parallel to each other.
- the communication antenna ANT 1 constituted by the wireless communication part 4 and the communication antenna ANT 2 constituted by the wireless communication parts 5 and 6 are connected in parallel to each other, they can be made to function independently. This allows one of the communication antennas ANT 1 and ANT 2 to be removed depending on a product specification.
- FIG. 4 B is a circuit diagram illustrating another example of connection relation for the wireless communication parts 4 to 6 .
- the antenna module 1 includes two semiconductor ICs 7 A and 7 B for communication.
- Signal wires 8 A and 9 A connected to the semiconductor IC 7 A are connected with an inductor Lemc and a capacitor Cemc which function as an EMC noise filter and capacitors Cs and Cp functioning as a matching circuit, and a communication antenna ANT 1 constituted by the wireless communication part 4 .
- a signal wires 8 B and 9 B connected to the semiconductor IC 7 B are connected with an inductor Lemc and a capacitor Cemc which function as an EMC noise filter and capacitors Cs and Cp functioning as a matching circuit, and on this semiconductor IC 7 B side, communication antennas ANT 2 and ANT 3 constituted respectively by the wireless communication parts 5 and 6 are connected in parallel to each other.
- the wireless communication part 4 and wireless communication parts 5 and 6 may be connected to different semiconductor ICs. This allows the wireless communication part 4 and wireless communication parts 5 and 6 to be designed independently. Further, since the communication antennas ANT 2 and ANT 3 constituted respectively by the wireless communication parts 5 and 6 are connected in parallel to each other, they can be made to function independently. This allows one of the communication antennas ANT 2 and ANT 3 to be removed depending on a product specification.
- the wireless communication part 4 includes not only the antenna coil for NEC but also the power transmission coil for wireless power transmission, so that a magnetic sheet 30 is provided on the side opposite to the placement surface 3 with respect to the second substrate 20 so as to achieve high power transmission efficiency.
- a magnetic sheet is not provided for the wireless communication parts 5 and 6 since the wireless communication parts 5 and 6 each do not include a power transmission coil for wireless power transmission.
- the height position in the z-direction of the antenna coil included in each of the wireless communication parts 5 and 6 is lower than the height position in the z-direction of the antenna coil included in the wireless communication part 4 at least by the thickness of the magnetic sheet 30 in the z-direction.
- the thickness of the magnetic sheet 30 in the z-direction is larger than the thickness of each of the wireless communication parts 5 and 6 .
- the height position in the z-direction of the antenna coil included in each of the wireless communication parts 5 and 6 is lower than the height position of the surface of the magnetic sheet 30 that faces the power transmission coil on the second substrate 20 . This makes interference between the wireless communication part 4 and the wireless communication parts 5 and 6 less likely to occur, facilitating impedance matching in each of the wireless communication parts 4 to 6 .
- the wireless communication parts 5 and 6 may each be provided with a magnetic sheet suitable for NFC.
- the magnetic sheet for each of the wireless communication parts 5 and 6 is smaller in thickness than the magnetic sheet 30 provided for the wireless communication part 4 .
- the height position in the z-direction of the antenna coil included in each of the wireless communication parts 5 and 6 is lower than the height position in the z-rection of antenna coil included in the wireless communication part 4 and the height position of the surface of the magnetic sheet 30 that faces the power transmission coil on the second substrate 20 .
- FIG. 5 is a schematic cross-sectional view for explaining the structure of the wireless communication part 4 .
- the wireless communication part 4 includes the first and second substrates 10 and 20 made of a PET (Polyethylene Terephthalate) film or the like, a first coil pattern CP 1 which is a conductor pattern made of a good conductor such as Cu and provided on one surface 11 and the other surface 12 of the first substrate 10 , a second coil pattern CP 2 which is a conductor pattern made of a good conductor such as Cu and provided on one surface 21 and the other surface 22 of the second substrate 20 , and the magnetic sheet 30 .
- the first coil pattern CP 1 is an antenna coil for NFC (Near Field communication)
- the second coil pattern CP 2 is a power transmission coil for wireless power transmission.
- the first and second coil patterns CP 1 and CP 2 overlap each other in the coil axis direction.
- the coil axis direction of each of the first and second coil patterns CP 1 and CP 2 is the z-direction, and the first substrate 10 , second substrate 20 , and magnetic sheet 30 are arranged in this order in an overlapping manner.
- the second substrate 20 is disposed between the first substrate 10 and the magnetic sheet 30 , and the distance between the magnetic sheet 30 and the first substrate 10 in the z-direction is larger than the distance between the magnetic sheet 30 and the second substrate 20 in the z-direction.
- FIG. 6 is a schematic plan view illustrating the pattern shape of the first coil pattern CP 1 .
- conductor patterns P 1 and P 2 are formed on one surface 11 of the first substrate 10 , and a conductor pattern P 3 is formed on the other surface 12 of the first substrate 10 .
- the conductor patterns P 1 to P 3 constitute the first coil pattern CP 1 .
- One end of the conductor pattern P 1 is connected to a terminal electrode E 1
- the other end of the conductor pattern P 1 is connected to one end of the conductor pattern P 3 through a via conductor 71 penetrating the first substrate 10
- One end of the conductor pattern P 2 is connected to a terminal electrode E 2
- the other end of the conductor pattern P 2 is connected to the other end of the conductor pattern P 3 through a via conductor 72 penetrating the first substrate 10 .
- the first coil pattern CP 1 constituted by the conductor patterns P 1 to P 3 includes first, second, and third turns T 1 , T 2 , and T 3 wound in a substantially rectangular shape.
- the first turn T 1 is positioned in the opening of the second turn T 2
- the second turn T 2 is positioned in the opening of the third turn T 3 .
- the first turn T 1 is the innermost turn of the first coil pattern CP 1 .
- the opening width of the first turn T 1 in the y-direction is Y 1
- that in the x-direction is X 1 .
- the y-direction is, for example, a first direction
- the x-direction is, for example, a second direction.
- the second turn T 2 is positioned outside the first turn T 1 .
- the opening width of the second turn T 2 in the y-direction is Y 2 and is larger than the opening width Y 1 of the first turn T 1 (Y 2 >Y 1 ), and the opening width of the second turn T 2 in the x-direction is X 2 and is larger than the opening width X 1 of the first turn T 1 (X 2 >X 1 ).
- the third turn T 3 is positioned outside the second turn T 2 .
- the opening width of the third turn T 3 in the y-direction is Y 3 and is larger than the opening width Y 2 of the second turn T 2 (Y 3 >Y 2 ), and the opening width of the third turn T 3 in the x-direction is X 3 and is larger than the opening width X 2 of the second turn T 2 (X 3 >X 2 ).
- the opening width Y 1 of the first turn T 1 in the y-direction is larger than the opening width X 1 in the x-direction (Y 1 >X 1 ).
- the opening width Y 2 of the second turn T 2 in the y-direction is larger than the opening width X 2 in the x-direction (Y 2 >X 2 ).
- the opening width Y 3 of the third turn T 3 in the y-direction is smaller than the opening width X 3 in the x-direction (Y 3 ⁇ X 3 ).
- the first and second turns T 1 and T 2 each have a vertically long rectangular shape, while the third turn T 3 has a horizontally long rectangular shape.
- the terminal electrodes E 1 and E 2 are the start and end points, respectively
- the first coil pattern CP 1 is wound proceeding in the following order: a part of the third turn T 3 ⁇ second turn T 2 ⁇ first turn T 1 ⁇ the remaining part of the third turn T 3 .
- the third turn T 3 includes the conductor pattern P 3 formed on the surface 12 of the first substrate 10 .
- the first and second turns T 1 and T 2 are entirely constituted by the conductor pattern P 1 formed on the surface 11 of the first substrate 10 .
- the first turn T 1 has sections 41 and 42 extending in the x-direction and sections 43 and 44 extending in the y-direction.
- the sections 41 and 42 linearly extend in the x-direction, and the sections 43 and 44 linearly extend in the y-direction.
- the first turn T 1 has a substantially rectangular planar shape with rounded corner portions.
- the second turn T 2 has sections 51 and 52 extending in the x-direction and sections 53 and 54 extending in the y-direction.
- the sections 51 and 52 linearly extend in the x-direction, and the sections 53 and 54 linearly extend in the y-direction.
- the second turn T 2 has a substantially rectangular planar shape with rounded corner portions.
- the third turn T 3 has sections 61 and 62 extending in the x-direction and sections 63 and 64 extending in the y-direction.
- the sections 61 and 62 linearly extend in the x-direction, and the sections 63 and 64 linearly extend in the y-direction.
- the third turn T 3 has a substantially rectangular planar shape with rounded corner portions.
- the first distance D 1 is smaller than the second distance D 2 (D 1 ⁇ D 2 ).
- the first and second turns T 1 and T 2 each have a vertically long rectangular shape, and the difference between the opening widths X 1 and X 2 thereof in the x-direction is small, while the third turn T 3 has a horizontally long rectangular shape, and the difference between the opening width X 3 thereof in the x-direction and the opening width X 2 of the second turn T 2 in the x-direction is large.
- the third distance D 3 is smaller than the first distance D 1 (D 1 >D 3 ). That is, the first and second turns T 1 and T 2 each have a vertically long rectangular shape, and the difference between the opening widths X 1 and X 2 thereof in the x-direction is small, and the difference between the opening widths Y 1 and Y 2 thereof in the y-direction is smaller than the small difference between the opening widths X 1 and X 2 .
- the fourth distance D 4 is smaller than the second distance D 2 (D 2 >D 4 ). That is, the second and third turns T 2 and T 3 have a vertically long rectangular shape and a horizontally long rectangular shape, respectively, and the difference between the opening widths Y 2 and Y 3 thereof in the y-direction is smaller than the distance between the opening widths X 2 and X 3 thereof in the x-direction.
- the section 52 of the second turn T 2 is disposed slightly inward so as not to interfere with the terminal electrodes E 1 and E 2 , so that the difference between the section 52 of the second turn T 2 and the section 62 of the third turn T 3 is larger than the difference between the section 51 of the second turn T 2 and the section 61 of the third turn T 3 .
- the fourth distance D 4 is smaller than the second distance D 2 in both the cases where it is defined as the difference between the section 52 of the second turn T 2 and the section 62 of the third turn T 3 and the difference between the section 51 of the second turn T 2 and the section 61 of the third turn T 3 .
- the first coil pattern CP 1 functioning as an antenna coil has such a configuration that the first and second turns T 1 and T 2 each have a vertically long rectangular shape and the third turn T 3 has a horizontally long rectangular shape and that the first distance D 1 is smaller than the second distance D 2 , so that the communicable range in the x-direction is extended while improving communication characteristics when the smartphone S 1 is positioned at the center of the placement surface 3 in the x-direction as illustrated in FIG. 2 A .
- This allows communication to be performed even when the position of the smartphone S 1 on the placement surface 3 is offset in the x-direction as illustrated in FIGS. 2 B and 2 C .
- the first coil pattern CP 1 can have a sufficient opening width in the y-direction.
- the smartphone S 1 is offset in the y-direction, communication can be performed satisfactorily.
- FIG. 7 is a schematic plan view illustrating the pattern shape of a conductor pattern formed on the surface 21 of the second substrate 20 .
- a spiral conductor pattern 100 constituting the second coil pattern CP 2 is formed on the surface 21 of the second substrate 20 .
- the conductor pattern 100 constituting the second coil pattern CP 2 has a six-turn configuration including turns 110 , 120 , 130 , 140 , 150 , and 160 , in which the turns 110 and 160 are positioned at the outermost and innermost peripheries, respectively.
- the turns 110 , 120 , 130 , 140 , and 150 are each radially divided into four by three spiral slits.
- the turn 160 is radially divided into two by one spiral slit.
- the turn 110 is divided into four lines 111 to 114
- the turn 120 is divided into four lines 121 to 124
- the turn 130 is divided into four lines 131 to 134
- the turn 140 is divided into four lines 141 to 144
- the turn 150 is divided into four lines 151 to 154
- the turn 160 is divided into two lines 161 and 162 .
- the lines 111 , 121 , 131 , 141 , 151 , and 161 are continuous lines spirally wound in six turns and are each positioned at the outermost periphery in its corresponding turn.
- the lines 112 , 122 , 132 , 142 , 152 , and 162 are continuous lines spirally wound in six turns and are each the second line counted from the outermost peripheral line in its corresponding turn.
- the lines 113 , 123 , 133 , 143 , and 153 are continuous lines spirally wound in five turns and are each the second line counted from the innermost peripheral line in its corresponding turn.
- the lines 114 , 124 , 134 , 144 , and 154 are continuous lines spirally wound in five turns and are each positioned at the innermost periphery in its corresponding turn.
- the outer peripheral ends of the lines 111 to 114 are connected in common to a terminal electrode E 3 .
- the inner peripheral ends of the lines 161 , 162 , 153 , and 154 are connected respectively to through hole conductors 301 to 304 penetrating the second substrate 20 .
- FIG. 8 is a schematic plan view illustrating the pattern shape of a conductor pattern formed on the surface 22 of the second substrate 20 , which illustrates a state viewed from the surface 21 side of the second substrate 20 transparently through the second substrate 20 .
- a spiral conductor pattern 200 constituting the second coil pattern CP 2 is formed on the other surface 22 of the second substrate 20 .
- the surface 22 of the second substrate faces the magnetic sheet 30 ; however, the second substrate 20 may be disposed such that the surface 21 of the second substrate 20 faces the magnetic sheet 30 .
- the pattern shape of the main part of the conductor pattern 200 constituting the second coil pattern CP 2 is the same as the pattern shape of the conductor pattern 100 .
- the second coil pattern CP 2 has a six-turn configuration including turns 210 , 220 , 230 , 240 , 250 , and 260 , in which the turn 210 and turn 260 are positioned at the outermost and innermost peripheries, respectively.
- the turns 210 , 220 , 230 , 240 , and 250 are each radially divided into four by three spiral slits.
- the turn 260 is radially divided into two by one spiral slit.
- the turn 210 is divided into four lines 211 to 214
- the turn 220 is divided into four lines 221 to 224
- the turn 230 is divided into four lines 231 to 234
- the turn 240 is divided into four lines 241 to 244
- the turn 250 is divided into four lines 251 to 254
- the turn 260 is divided into two lines 261 and 262 .
- the lines 211 , 221 , 231 , 241 , 251 , and 261 are continuous lines spirally wound in six turns and are each positioned at the outermost periphery in its corresponding turn.
- the lines 212 , 222 , 232 , 242 , 252 , and 262 are continuous lines spirally wound in six turns and are each the second line counted from the outermost peripheral line in its corresponding turn.
- the lines 213 , 223 , 233 , 243 , and 253 are continuous lines spirally wound in five turns and are each the second line counted from the innermost peripheral line in its corresponding turn.
- the lines 214 , 224 , 234 , 244 , and 254 are continuous lines spirally wound in five turns and are each positioned at the innermost periphery in its corresponding turn.
- the outer peripheral ends of the lines 211 to 214 are connected in common to a terminal electrode E 4 through a through hole conductor.
- the inner peripheral ends of the lines 261 , 262 , 253 , and 254 are connected respectively to through hole conductors 304 , 303 , 302 , and 301 .
- four lines each having 11 turns are connected in parallel between the terminal electrodes E 3 and E 4 .
- FIG. 6 illustrates the planar positional relation between the first and second coil patterns CP 1 and CP 2 in a state where the first and second substrates 10 and 20 overlap each other.
- an inner shape ID defined by the innermost peripheral turn of the second coil pattern CP 2 and an outer shape OD defined by the outermost peripheral turn of the second coil pattern CP 2 are denoted by dashed lines.
- the area between the inner shape ID and the outer shape OD is a coil area where a plurality of lines constituting the second coil pattern CP 2 are disposed, and the radial width thereof corresponds to the winding width of the second coil pattern CP 2 .
- the second coil pattern CP 2 is made to overlap the first coil pattern CP 1 such that the y- and x-directions thereof are the short side direction and the long side direction, respectively.
- wireless power transmission can be performed efficiently even when the position of the smartphone S 1 or S 2 on the placement surface 3 is offset in the x-direction as illustrated in FIGS. 2 B, 2 C or FIGS. 3 B, 3 C .
- an opening width Xi in the x-direction of the inner shape ID of the second coil pattern CP 2 is larger than the opening width X 1 in the x-direction of the first turn T 1 of the first coil pattern CP 1 and smaller than the opening width X 2 in the x-direction of the second turn T 2 of the first coil pattern CP 1 .
- an opening width Xo in the x-direction of the outer shape OD of the coil pattern CP 2 is larger than the opening width X 2 in the x-direction of the second turn T 2 of the first coil pattern CP 1 and substantially the same as or slightly smaller than the opening width X 3 in the x-direction of the third turn T 3 of the first coil pattern CP 1 .
- FIG. 9 is a schematic cross-sectional view for explaining the structures of the wireless communication parts 5 and 6 .
- the wireless communication part 5 is constituted by a third substrate 73 made of a PET film and a third coil pattern CP 3 formed on one surface 74 of the third substrate 73 .
- the wireless communication part 6 is constituted by a fourth substrate 75 made of a PET film and a fourth coil pattern CP 4 formed on one surface 76 of the fourth substrate 75 .
- the third and fourth coil patterns CP 3 and CP 4 are each an antenna coil for NFC.
- the third and fourth coil patterns CP 3 and CP 4 may have the same pattern shape.
- the third and fourth coil patterns CP 3 and CP 4 are each a planar spiral coil pattern wound in a plurality of turns, and the outer shape and the opening each thereof has a rectangular shape having a short side in the x-direction and a long side in the y-direction.
- the number of turns of each of the third and fourth coil patterns CP 3 and CP 4 is four, but not limited thereto.
- the planar shape of each of the third and fourth coil patterns CP 3 and CP 4 is not limited to a rectangular shape and may be a circular or elliptic shape.
- FIG. 10 is a block diagram of a wireless power transmission device 90 using the antenna module 1 according to the present embodiment.
- the wireless power transmission device 90 illustrated in FIG. 10 includes the antenna module 1 having the first to fourth coil patterns CP 1 to CP 4 , a communication circuit 91 connected to the first, third, and fourth coil patterns CP 1 , CP 3 , and CP 4 , and a power transmission circuit 92 connected to the second coil pattern CP 2 .
- a capacitor C 1 is connected between the communication circuit 91 and the first, third, and fourth coil patterns CP 1 , CP 3 , and CP 4 .
- the communication circuit 91 and power transmission circuit 92 are connected to a control circuit 93 .
- data to be exchanged through a communication line 94 can be communicated through the first, third, and fourth coil patterns CP 1 , CP 3 , and CP 4 for NFC, and the power to be supplied from a power supply 95 can be wirelessly transmitted through the second coil pattern CP 2 for wireless power transmission.
- FIG. 11 is a schematic plan view illustrating the pattern shape of the first coil pattern CP 1 according to a first modification.
- the first coil pattern CP 1 according to the first modification illustrated in FIG. 11 differs from the first coil pattern CP 1 illustrated in FIG. 6 in that it further includes a fourth turn T 4 which is a part of the conductor pattern P 1 that is wound in a rectangular shape on the surface 11 of the first substrate 10 .
- Other configurations are basically the same as those of the first coil pattern CP 1 illustrated in FIG. 6 , so the same reference numerals are given to the same elements, and overlapping description will be omitted.
- the fourth turn T 4 is disposed between the second and third turns T 2 and T 3 .
- the first coil pattern CP 1 is wound proceeding in the following order: a part of the third turn T 3 ⁇ fourth turn T 4 ⁇ second turn T 2 ⁇ first turn T 1 ⁇ the remaining part of the third turn T 3 .
- the opening width of the fourth turn T 4 in the x-direction is X 4
- that in the y-direction is Y 4 .
- the opening width X 4 is smaller than the opening width X 3 of the third turn T 3 and larger than the opening width X 2 of the second turn T 2 (X 3 >X 4 >X 2 ).
- the opening width Y 4 is smaller than the opening width Y 3 of the third turn T 3 and larger than the opening width Y 2 of the second turn T 2 (Y 3 >Y 4 >Y 2 ).
- the opening width Y 4 of the fourth turn T 4 in the y-direction is smaller than the opening width X 4 thereof in the x-direction (Y 4 ⁇ X 4 ). That is, when the x- and y-directions are defined as the horizontal and vertical directions, respectively, the fourth turn T 4 has a horizontally long rectangular shape like the third turn T 3 .
- the fourth turn T 4 has sections 81 and 82 extending in the x-direction and sections 83 and 84 extending in the y-direction.
- the sections 81 and 82 linearly extend in the x-direction, and the sections 83 and 84 linearly extend in the y-direction.
- the fourth turn T 4 has a substantially rectangular planar shape with rounded corner portions.
- the fifth distance D 5 is smaller than the sixth distance D 6 (D 5 ⁇ D 6 ). That is, the third and fourth turns T 3 and T 4 each have a horizontally long rectangular shape, and the difference between the opening widths X 3 and X 4 thereof in the x-direction is small.
- first coil pattern CP 1 increases inductance to thereby improve communication characteristics.
- the sections 83 and 84 of the fourth turn T 4 are disposed in the vicinity of the sections 63 and 64 of the third turn T 3 , so that it is possible to significantly improve communication characteristics when the position of the smartphone S 1 on the placement surface 3 is offset in the x-direction as illustrated in FIGS. 2 B and 2 C .
- FIG. 12 is a schematic plan view illustrating the pattern shape of the first coil pattern CP 1 according to a second modification.
- the first coil pattern CP 1 according to the second modification illustrated in FIG. 12 differs from the first coil pattern CP 1 illustrated in FIG. 11 in the planar shape of the fourth turn T 4 .
- Other configurations are basically the same as those of the first coil pattern CP 1 illustrated in FIG. 11 , so the same reference numerals are given to the same elements, and overlapping description will be omitted.
- the sections 81 and 82 of the fourth turn T 4 each linearly extend in the x-direction, while the sections 83 and 84 each have a section shifting in position in the x-direction.
- the section 83 has a straight line sections 830 and 831 linearly extending in the y-direction and a protruding section A 1 positioned between the straight line sections 830 and 831 and bulging outside in the x-direction.
- the protruding section A 1 has a second straight line section 832 connected to the straight line section 830 and linearly extending in the x-direction, a third straight line section 833 connected to the straight line section 831 and linearly extending in the x-direction, and a first straight line section 834 connecting the second and third straight line sections 832 and 833 and extending in the y-direction.
- the section 84 has straight line sections 840 and 841 linearly extending in the y-direction and a protruding section A 2 positioned between the straight line sections 840 and 841 and bulging outside in the x-direction.
- the protruding section A 2 has a second straight line section 842 connected to the straight line section 840 and linearly extending in the x-direction, a third straight line section 843 connected to the straight line section 841 and linearly extending in the x-direction, and a first straight line section 844 connecting the second and third straight line sections 842 and 843 and extending in the y-direction.
- a distance D 6 b in the x-direction between the section 53 ( 54 ) of the second turn T 2 and the first straight line section 834 ( 844 ) of the fourth turn T 4 is larger than a distance D 6 a in the x-direction between the section 53 ( 54 ) of the second turn T 2 and the straight line sections 830 , 831 ( 840 , 841 ) of the fourth turn T 4 (D 6 b >D 6 a ).
- the seventh distance D 7 is smaller than the first distance D 1 .
- first coil pattern CP 1 allows communication to be properly performed even when the position of an antenna coil as a communication target is displaced from the center in the y-direction. This allows communication with an antenna coil RX 1 incorporated in the smartphone S 1 . Further, when an IC card having a wireless communication function is provided between the placement surface 3 of the housing 2 and the smartphone S 1 , detection of the IC card becomes possible. When the IC card is actually detected, wireless power transmission using the second coil pattern CP 2 is stopped, whereby breakage of the IC card can be prevented. In addition, since the seventh distance D 7 is smaller than the first distance D 1 , it is possible to further improve communication characteristics when the position of the smartphone S 1 on the placement surface 3 is offset in the x-direction as illustrated in FIGS. 2 B and 2 C .
- the technology according to the present disclosure includes the following configuration examples but not limited thereto.
- An antenna module has a first coil pattern including at least first, second, and third turns.
- the first turn is positioned in the opening of the second turn, and the second turn is positioned in the opening of the third turn.
- the first and second turns each have an opening width larger in a first direction than in a second direction perpendicular to the first direction.
- a first distance between the first and second turns in the second direction is smaller than a second distance between the second and third turns in the second direction
- a third distance between the first and second turns in the first direction is smaller than the first distance
- a fourth distance between the second and third turns in the first direction is smaller than the second distance.
- the third turn has an opening width larger in the second direction than in the first direction.
- the first coil pattern may further include a fourth turn positioned between the second and third turns. This increases inductance to allow improvement in communication characteristics.
- a fifth distance between the fourth and third turns in the second direction may be smaller than a sixth distance between the fourth and second turns in the second direction. This allows communication to be properly performed even when a communication target device is significantly offset in the second direction.
- a part of the fourth turn that extends in the first direction may include a protruding section, the distance in the second direction between the second turn extends in the first direction and the fourth turn extends in the first direction increases at the protruding section.
- the protruding section may have a first straight line section extending in the first direction and a second straight line section extending in the second direction. This makes it possible to improve communication characteristics at substantially the center in the first direction while extending a communicable range in the second direction.
- a seventh distance in the second direction between the first straight line section of the protruding section and a part of the third turn that extends in the first direction may be smaller than the first distance. This allows further improvement in communication characteristics when a communication target device is significantly offset in the second direction.
- the antenna module according to the present disclosure may further include a second coil pattern overlapping the first coil pattern as viewed in the coil axis direction of the first coil pattern.
- the second coil pattern may overlap the first coil pattern such that the first and second directions thereof are the short side direction and the long side direction, respectively. This allows power transmission to be properly performed even when a charging target device is significantly offset in the second direction.
- the antenna module according to the present disclosure may further include a third coil pattern disposed at one side of the first coil pattern in the second direction so as not to overlap the first coil pattern as viewed in the coil axis direction. This allows communication to be properly performed in both the cases where an antenna coil provided in a communication target device is disposed at substantially the center in the second direction and where it is disposed at the end portion in the second direction.
- the antenna module may further include a fourth coil pattern disposed at the other side of the first coil pattern in the second direction so as not to overlap the first coil pattern as viewed in the coil axis direction. This allows communication to be properly performed even when the antenna coil disposed at the end portion in the second direction is rotated by 180° in the second direction.
- the first and third coil patterns may be connected in parallel. This allows the first and third coil patterns to function independently of each other.
- the height position of the third coil pattern in the coil axis direction may be lower than the height position of the first coil pattern in the coil axis direction. This can suppress coupling between the first and third coil patterns.
- the antenna module may further include a magnetic sheet disposed on the side opposite to the first coil pattern with respect to the second coil pattern, and the height position of the third coil pattern in the coil axis direction may be lower than the height position of the surface of the magnetic sheet that faces the second coil pattern. This can further suppress coupling between the first and third coil patterns.
- a wireless power transmission device may include the above-described antenna module, a communication circuit connected to the first coil pattern, and a power transmission circuit connected to the second coil pattern. This makes it possible to perform wireless power transmission and NFC-based communication.
Abstract
Disclosed herein is an antenna module sheet that includes a first coil pattern including first to third turns. The first turn is positioned in an opening of the second turn, and the second turn is positioned in an opening of the third turn. Each of the first and second turns has an opening width larger in a first direction than in a second direction. The first distance between the first and second turns in the second direction is smaller than the second distance between the second and third turns in the second direction. The third distance between the first and second turns in the first direction is smaller than the first distance. The fourth distance between the second and third turns in the first direction is smaller than the second distance. The third turn has an opening width larger in the second direction than in the first direction.
Description
- This application claims the benefit of Japanese Patent Application No. 2022-031038, filed on Mar. 1, 2022, the entire disclosure of which is incorporated by reference herein.
- The present disclosure relates to an antenna module and a wireless power transmission device having the same.
- International Publication WO 2014/077098 discloses a coil pattern having a pattern shape in which a ratio between the long side and the short side of one turn increase toward the inner peripheral side.
- However, in the antenna module described in International Publication WO 2014/077098, there is a need to increase the number of turns in order to extend a communicable range, which disadvantageously increases a DC resistance to cause a change in impedance.
- An antenna module according to the present disclosure has a first coil pattern including at least first, second, and third turns. The first turn is positioned in the opening of the second turn, and the second turn is positioned in the opening of the third turn. The first and second turns each have an opening width larger in a first direction than in a second direction perpendicular to the first direction. A first distance between the first and second turns in the second direction is smaller than a second distance between the second and third turns in the second direction, a third distance between the first and second turns in the first direction is smaller than the first distance, and a fourth distance between the second and third turns in the first direction is smaller than the second distance. The third turn has an opening width larger in the second direction than in the first direction.
- The above features and advantages of the present disclosure will be more apparent from the following description of certain preferred embodiments taken in conjunction with the accompanying drawings, in which:
-
FIGS. 1A and 1B are schematic views for explaining the structure of anantenna module 1 according to one embodiment of the present disclosure, whereFIG. 1A is a schematic plan view, andFIG. 1B is a schematic cross-sectional view taken along the line A-A illustrated inFIG. 1A ; -
FIGS. 2A to 2C are schematic views illustrating a state where a smartphone S1 is placed on theplacement surface 3 of thehousing 2; -
FIGS. 3A to 3C are schematic views illustrating a state where a smartphone S2 is placed on theplacement surface 3 of thehousing 2; -
FIG. 4A is a circuit diagram illustrating an example of connection relation for thewireless communication parts 4 to 6; -
FIG. 4B is a circuit diagram illustrating another example of connection relation for thewireless communication parts 4 to 6; -
FIG. 5 is a schematic cross-sectional view for explaining the structure of thewireless communication part 4; -
FIG. 6 is a schematic plan view illustrating the pattern shape of the first coil pattern CP1; -
FIG. 7 is a schematic plan view illustrating the pattern shape of a conductor pattern formed on thesurface 21 of thesecond substrate 20; -
FIG. 8 is a schematic plan view illustrating the pattern shape of a conductor pattern formed on thesurface 22 of thesecond substrate 20; -
FIG. 9 is a schematic cross-sectional view for explaining the structures of thewireless communication parts -
FIG. 10 is a block diagram of a wirelesspower transmission device 90 using theantenna module 1 according to the present embodiment; -
FIG. 11 is a schematic plan view illustrating the pattern shape of the first coil pattern CP1 according to a first modification; and -
FIG. 12 is a schematic plan view illustrating the pattern shape of the first coil pattern CP1 according to a second modification. - An object of the present disclosure to provide an antenna module having a coil pattern achieving a wide communicable range in a predetermined direction while suppressing an increase in the number of turns.
- Preferred embodiments of the present disclosure will be explained below in detail with reference to the accompanying drawings.
-
FIGS. 1A and 1B are schematic views for explaining the structure of anantenna module 1 according to one embodiment of the present disclosure.FIG. 1A is a schematic plan view, andFIG. 1B is a schematic cross-sectional view taken along the line A-A illustrated inFIG. 1A . - As illustrated in
FIGS. 1A and 1B , theantenna module 1 according to the present embodiment includes ahousing 2 having aplacement surface 3 for placing thereon a mobile communication device such as a smartphone andwireless communication parts 4 to 6 each disposed in the inner space of thehousing 2 so as to overlap theplacement surface 3. Thewireless communication part 4 is positioned at substantially the center of thehousing 2 in the x-direction, thewireless communication part 5 is positioned at one side of thehousing 2 in the negative x-direction, and thewireless communication part 6 is positioned at the other side of thehousing 2 in the positive x-direction. Thewireless communication parts 4 to 6 do not overlap one another in the z-direction. Thewireless communication part 4 has a structure in which afirst substrate 10, asecond substrate 20, and amagnetic sheet 30 are stacked. As will be described later, thefirst substrate 10 has thereon an antenna coil for NFC (Near Field communication), and thesecond substrate 20 has thereon a power transmission coil for a wireless power transmission. Thus, thewireless communication part 4 has both a wireless communication function and a wireless power transmission function. On the other hand, thewireless communication parts placement surface 3 of theantenna module 1 is designed to be wide so as to allow various sizes of smartphones to be placed thereon, so that the position of a smartphone placed on theplacement surface 3 may shift in the x-direction of theplacement surface 3. Further, when theantenna module 1 is provided in a console inside a vehicle, a smartphone placed on the placement surface may shift in position due to vibration of the vehicle. Theantenna module 1 according to the present embodiment can perform wireless communication and wireless power transmission even when a smartphone placed on theplacement surface 3 shifts in position. -
FIGS. 2A to 2C are schematic views illustrating a state where a smartphone S1 is placed on theplacement surface 3 of thehousing 2.FIG. 2A illustrates a state where the smartphone S1 is placed at substantially the center of theplacement surface 3 in the x-direction,FIG. 2B illustrates a state where the smartphone S1 is placed offset to one side of theplacement surface 3 in the negative x-direction, andFIG. 2C illustrates a state where the smartphone S1 is placed offset to the other side of theplacement surface 3 in the positive x-direction. - The smartphone S1 illustrated in
FIGS. 2A to 2C , which has a long side in the x-direction and a short side in the y-direction, includes an antenna coil RX1 for NFC and a power receiving coil RX2 for wireless power transmission which are disposed at substantially the center thereof in the x-direction. When the smartphone S1 of such a type is placed on theplacement surface 3 of thehousing 2, wireless communication and wireless power transmission can be performed using thewireless communication part 4 irrespective of the x-direction position of the smartphone S1 on theplacement surface 3. In this case, thewireless communication parts wireless communication part 4 and the antenna and power receiving coils RX1 and RX2 of the smartphone S1 in the x-direction changes depending on the x-direction position of the smartphone S1 on theplacement surface 3, so that thewireless communication part 4 is designed to provide a wide range of coupling with the antenna and power receiving coils RX1 and RX2 in the x-direction. -
FIGS. 3A to 3C are schematic views illustrating a state where a smartphone S2 is placed on theplacement surface 3 of thehousing 2.FIG. 3A illustrates a state where the smartphone S2 is placed at substantially the center of theplacement surface 3 in the x-direction,FIG. 3B illustrates a state where the smartphone S2 is placed offset to one side of theplacement surface 3 in the negative x-direction, andFIG. 3C illustrates a state where the smartphone S2 is placed offset to the other side of theplacement surface 3 in the positive x-direction. - The smartphone S2 illustrated in
FIGS. 3A to 3C , which has a long side in the x-direction and a short side in the y-direction, includes the antenna coil RX1 for NFC disposed at one side thereof in the x-direction and the power receiving coil RX2 for wireless power transmission disposed at substantially the center thereof in the x-direction. When the smartphone S2 of such a type is placed on theplacement surface 3 of thehousing 2, wireless power transmission can be performed using thewireless communication part 4 irrespective of the x-direction position of the smartphone S2 on theplacement surface 3. On the other hand, for wireless communication, when the smartphone S2 is placed on theplacement surface 3 such that the antenna coil RX1 is disposed at the negative x-direction side (seeFIGS. 3A and 3B ), thewireless communication part 5 is used, while when the smartphone S2 is placed on theplacement surface 3 such that the antenna coil RX1 is disposed at the positive x-direction side (seeFIG. 3C ), thewireless communication part 6 is used. As described above, either thewireless communication part -
FIG. 4A is a circuit diagram illustrating an example of connection relation for thewireless communication parts 4 to 6. - In the example illustrated in
FIG. 4A , theantenna module 1 according to the present embodiment includes a semiconductor IC 7 for communication, and thewireless communication parts 4 to 6 are connected to a pair ofsignal wires 8 and 9 connected to the semiconductor IC 7. Thesignal wires 8 and 9 are connected with an inductor Lemc and a capacitor Cemc which function as an EMC noise filter and capacitors Cs and Cp functioning as a matching circuit. A communication antenna ANT1 constituted by thewireless communication part 4 and a communication antenna ANT2 constituted by thewireless communication parts FIGS. 2A to 2C or smartphone S2 of a type illustrated inFIGS. 3A to 3C is placed on theplacement surface 3 of thehousing 2, wireless communication can be properly performed. Further, since the communication antenna ANT1 constituted by thewireless communication part 4 and the communication antenna ANT2 constituted by thewireless communication parts -
FIG. 4B is a circuit diagram illustrating another example of connection relation for thewireless communication parts 4 to 6. - In the example illustrated in
FIG. 4B , theantenna module 1 according to the present embodiment includes twosemiconductor ICs Signal wires 8A and 9A connected to thesemiconductor IC 7A are connected with an inductor Lemc and a capacitor Cemc which function as an EMC noise filter and capacitors Cs and Cp functioning as a matching circuit, and a communication antenna ANT1 constituted by thewireless communication part 4. On the other hand, asignal wires semiconductor IC 7B are connected with an inductor Lemc and a capacitor Cemc which function as an EMC noise filter and capacitors Cs and Cp functioning as a matching circuit, and on thissemiconductor IC 7B side,communication antennas ANT 2 andANT 3 constituted respectively by thewireless communication parts wireless communication part 4 andwireless communication parts wireless communication part 4 andwireless communication parts communication antennas ANT 2 andANT 3 constituted respectively by thewireless communication parts - The
wireless communication part 4 includes not only the antenna coil for NEC but also the power transmission coil for wireless power transmission, so that amagnetic sheet 30 is provided on the side opposite to theplacement surface 3 with respect to thesecond substrate 20 so as to achieve high power transmission efficiency. Such a magnetic sheet is not provided for thewireless communication parts wireless communication parts wireless communication parts wireless communication part 4 at least by the thickness of themagnetic sheet 30 in the z-direction. In order to achieve high power transmission efficiency, it is necessary to ensure a sufficient thickness of themagnetic sheet 30 in the z-direction. In the example illustrated inFIG. 1B , the thickness of themagnetic sheet 30 in the z-direction is larger than the thickness of each of thewireless communication parts wireless communication parts magnetic sheet 30 that faces the power transmission coil on thesecond substrate 20. This makes interference between thewireless communication part 4 and thewireless communication parts wireless communication parts 4 to 6. Thewireless communication parts wireless communication parts magnetic sheet 30 provided for thewireless communication part 4. Thus, even when thewireless communication parts wireless communication parts wireless communication part 4 and the height position of the surface of themagnetic sheet 30 that faces the power transmission coil on thesecond substrate 20. -
FIG. 5 is a schematic cross-sectional view for explaining the structure of thewireless communication part 4. - As illustrated in
FIG. 5 , thewireless communication part 4 includes the first andsecond substrates surface 11 and theother surface 12 of thefirst substrate 10, a second coil pattern CP2 which is a conductor pattern made of a good conductor such as Cu and provided on onesurface 21 and theother surface 22 of thesecond substrate 20, and themagnetic sheet 30. The first coil pattern CP1 is an antenna coil for NFC (Near Field communication), and the second coil pattern CP2 is a power transmission coil for wireless power transmission. The first and second coil patterns CP1 and CP2 overlap each other in the coil axis direction. The coil axis direction of each of the first and second coil patterns CP1 and CP2 is the z-direction, and thefirst substrate 10,second substrate 20, andmagnetic sheet 30 are arranged in this order in an overlapping manner. Specifically, thesecond substrate 20 is disposed between thefirst substrate 10 and themagnetic sheet 30, and the distance between themagnetic sheet 30 and thefirst substrate 10 in the z-direction is larger than the distance between themagnetic sheet 30 and thesecond substrate 20 in the z-direction. -
FIG. 6 is a schematic plan view illustrating the pattern shape of the first coil pattern CP1. - As illustrated in
FIG. 6 , conductor patterns P1 and P2 are formed on onesurface 11 of thefirst substrate 10, and a conductor pattern P3 is formed on theother surface 12 of thefirst substrate 10. The conductor patterns P1 to P3 constitute the first coil pattern CP1. One end of the conductor pattern P1 is connected to a terminal electrode E1, and the other end of the conductor pattern P1 is connected to one end of the conductor pattern P3 through a viaconductor 71 penetrating thefirst substrate 10. One end of the conductor pattern P2 is connected to a terminal electrode E2, and the other end of the conductor pattern P2 is connected to the other end of the conductor pattern P3 through a viaconductor 72 penetrating thefirst substrate 10. - The first coil pattern CP1 constituted by the conductor patterns P1 to P3 includes first, second, and third turns T1, T2, and T3 wound in a substantially rectangular shape. The first turn T1 is positioned in the opening of the second turn T2, and the second turn T2 is positioned in the opening of the third turn T3. The first turn T1 is the innermost turn of the first coil pattern CP1. The opening width of the first turn T1 in the y-direction is Y1, and that in the x-direction is X1. The y-direction is, for example, a first direction, and the x-direction is, for example, a second direction. The second turn T2 is positioned outside the first turn T1. The opening width of the second turn T2 in the y-direction is Y2 and is larger than the opening width Y1 of the first turn T1 (Y2>Y1), and the opening width of the second turn T2 in the x-direction is X2 and is larger than the opening width X1 of the first turn T1 (X2>X1). The third turn T3 is positioned outside the second turn T2. The opening width of the third turn T3 in the y-direction is Y3 and is larger than the opening width Y2 of the second turn T2 (Y3>Y2), and the opening width of the third turn T3 in the x-direction is X3 and is larger than the opening width X2 of the second turn T2 (X3>X2).
- The opening width Y1 of the first turn T1 in the y-direction is larger than the opening width X1 in the x-direction (Y1>X1). Similarly, the opening width Y2 of the second turn T2 in the y-direction is larger than the opening width X2 in the x-direction (Y2>X2). On the other hand, the opening width Y3 of the third turn T3 in the y-direction is smaller than the opening width X3 in the x-direction (Y3<X3). That is, when the x- and y-directions are defined as the horizontal and vertical directions, respectively, the first and second turns T1 and T2 each have a vertically long rectangular shape, while the third turn T3 has a horizontally long rectangular shape. Assuming that the terminal electrodes E1 and E2 are the start and end points, respectively, the first coil pattern CP1 is wound proceeding in the following order: a part of the third turn T3→second turn T2→first turn T1→the remaining part of the third turn T3. The third turn T3 includes the conductor pattern P3 formed on the
surface 12 of thefirst substrate 10. On the other hand, the first and second turns T1 and T2 are entirely constituted by the conductor pattern P1 formed on thesurface 11 of thefirst substrate 10. - The first turn T1 has
sections sections sections sections sections sections sections sections sections sections sections sections - When a first distance between the
sections sections sections sections - Further, when a third distance between the
sections sections - Further, when a fourth distance between the
sections sections section 52 of the second turn T2 is disposed slightly inward so as not to interfere with the terminal electrodes E1 and E2, so that the difference between thesection 52 of the second turn T2 and thesection 62 of the third turn T3 is larger than the difference between thesection 51 of the second turn T2 and thesection 61 of the third turn T3. However, the fourth distance D4 is smaller than the second distance D2 in both the cases where it is defined as the difference between thesection 52 of the second turn T2 and thesection 62 of the third turn T3 and the difference between thesection 51 of the second turn T2 and thesection 61 of the third turn T3. - As described above, the first coil pattern CP1 functioning as an antenna coil has such a configuration that the first and second turns T1 and T2 each have a vertically long rectangular shape and the third turn T3 has a horizontally long rectangular shape and that the first distance D1 is smaller than the second distance D2, so that the communicable range in the x-direction is extended while improving communication characteristics when the smartphone S1 is positioned at the center of the
placement surface 3 in the x-direction as illustrated inFIG. 2A . This allows communication to be performed even when the position of the smartphone S1 on theplacement surface 3 is offset in the x-direction as illustrated inFIGS. 2B and 2C . In addition, since the third distance D3 is smaller than the first distance D1, and the fourth distance D4 is smaller than the second distance D2, the first coil pattern CP1 can have a sufficient opening width in the y-direction. Thus, even when the smartphone S1 is offset in the y-direction, communication can be performed satisfactorily. -
FIG. 7 is a schematic plan view illustrating the pattern shape of a conductor pattern formed on thesurface 21 of thesecond substrate 20. - As illustrated in
FIG. 7 , aspiral conductor pattern 100 constituting the second coil pattern CP2 is formed on thesurface 21 of thesecond substrate 20. - The
conductor pattern 100 constituting the second coil pattern CP2 has a six-turn configuration including turns 110, 120, 130, 140, 150, and 160, in which theturns turn 160 is radially divided into two by one spiral slit. Specifically, theturn 110 is divided into fourlines 111 to 114, theturn 120 is divided into fourlines 121 to 124, theturn 130 is divided into four lines 131 to 134, theturn 140 is divided into fourlines 141 to 144, theturn 150 is divided into four lines 151 to 154, and theturn 160 is divided into twolines 161 and 162. - The
lines lines lines lines - The outer peripheral ends of the
lines 111 to 114 are connected in common to a terminal electrode E3. The inner peripheral ends of thelines hole conductors 301 to 304 penetrating thesecond substrate 20. -
FIG. 8 is a schematic plan view illustrating the pattern shape of a conductor pattern formed on thesurface 22 of thesecond substrate 20, which illustrates a state viewed from thesurface 21 side of thesecond substrate 20 transparently through thesecond substrate 20. - As illustrated in
FIG. 8 , aspiral conductor pattern 200 constituting the second coil pattern CP2 is formed on theother surface 22 of thesecond substrate 20. In the present embodiment, thesurface 22 of the second substrate faces themagnetic sheet 30; however, thesecond substrate 20 may be disposed such that thesurface 21 of thesecond substrate 20 faces themagnetic sheet 30. - The pattern shape of the main part of the
conductor pattern 200 constituting the second coil pattern CP2 is the same as the pattern shape of theconductor pattern 100. The second coil pattern CP2 has a six-turn configuration including turns 210, 220, 230, 240, 250, and 260, in which theturn 210 and turn 260 are positioned at the outermost and innermost peripheries, respectively. The turns 210, 220, 230, 240, and 250 are each radially divided into four by three spiral slits. Theturn 260 is radially divided into two by one spiral slit. Specifically, theturn 210 is divided into fourlines 211 to 214, theturn 220 is divided into fourlines 221 to 224, theturn 230 is divided into fourlines 231 to 234, theturn 240 is divided into fourlines 241 to 244, theturn 250 is divided into fourlines 251 to 254, and theturn 260 is divided into twolines - The
lines lines lines lines - The outer peripheral ends of the
lines 211 to 214 are connected in common to a terminal electrode E4 through a through hole conductor. The inner peripheral ends of thelines hole conductors -
FIG. 6 illustrates the planar positional relation between the first and second coil patterns CP1 and CP2 in a state where the first andsecond substrates FIG. 6 , an inner shape ID defined by the innermost peripheral turn of the second coil pattern CP2 and an outer shape OD defined by the outermost peripheral turn of the second coil pattern CP2 are denoted by dashed lines. The area between the inner shape ID and the outer shape OD is a coil area where a plurality of lines constituting the second coil pattern CP2 are disposed, and the radial width thereof corresponds to the winding width of the second coil pattern CP2. - As illustrated in
FIG. 6 , the second coil pattern CP2 is made to overlap the first coil pattern CP1 such that the y- and x-directions thereof are the short side direction and the long side direction, respectively. Thus, as in communication using the first coil pattern CP1, wireless power transmission can be performed efficiently even when the position of the smartphone S1 or S2 on theplacement surface 3 is offset in the x-direction as illustrated inFIGS. 2B, 2C orFIGS. 3B, 3C . - Further, as illustrated in
FIG. 6 , an opening width Xi in the x-direction of the inner shape ID of the second coil pattern CP2 is larger than the opening width X1 in the x-direction of the first turn T1 of the first coil pattern CP1 and smaller than the opening width X2 in the x-direction of the second turn T2 of the first coil pattern CP1. On the other hand, an opening width Xo in the x-direction of the outer shape OD of the coil pattern CP2 is larger than the opening width X2 in the x-direction of the second turn T2 of the first coil pattern CP1 and substantially the same as or slightly smaller than the opening width X3 in the x-direction of the third turn T3 of the first coil pattern CP1. -
FIG. 9 is a schematic cross-sectional view for explaining the structures of thewireless communication parts - As illustrated in
FIG. 9 , thewireless communication part 5 is constituted by a third substrate 73 made of a PET film and a third coil pattern CP3 formed on one surface 74 of the third substrate 73. Thewireless communication part 6 is constituted by a fourth substrate 75 made of a PET film and a fourth coil pattern CP4 formed on one surface 76 of the fourth substrate 75. The third and fourth coil patterns CP3 and CP4 are each an antenna coil for NFC. The third and fourth coil patterns CP3 and CP4 may have the same pattern shape. The third and fourth coil patterns CP3 and CP4 are each a planar spiral coil pattern wound in a plurality of turns, and the outer shape and the opening each thereof has a rectangular shape having a short side in the x-direction and a long side in the y-direction. In the example illustrated inFIG. 9 , the number of turns of each of the third and fourth coil patterns CP3 and CP4 is four, but not limited thereto. Further, the planar shape of each of the third and fourth coil patterns CP3 and CP4 is not limited to a rectangular shape and may be a circular or elliptic shape. -
FIG. 10 is a block diagram of a wirelesspower transmission device 90 using theantenna module 1 according to the present embodiment. - The wireless
power transmission device 90 illustrated inFIG. 10 includes theantenna module 1 having the first to fourth coil patterns CP1 to CP4, acommunication circuit 91 connected to the first, third, and fourth coil patterns CP1, CP3, and CP4, and apower transmission circuit 92 connected to the second coil pattern CP2. A capacitor C1 is connected between thecommunication circuit 91 and the first, third, and fourth coil patterns CP1, CP3, and CP4. Thecommunication circuit 91 andpower transmission circuit 92 are connected to acontrol circuit 93. With this configuration, data to be exchanged through acommunication line 94 can be communicated through the first, third, and fourth coil patterns CP1, CP3, and CP4 for NFC, and the power to be supplied from apower supply 95 can be wirelessly transmitted through the second coil pattern CP2 for wireless power transmission. -
FIG. 11 is a schematic plan view illustrating the pattern shape of the first coil pattern CP1 according to a first modification. - The first coil pattern CP1 according to the first modification illustrated in
FIG. 11 differs from the first coil pattern CP1 illustrated inFIG. 6 in that it further includes a fourth turn T4 which is a part of the conductor pattern P1 that is wound in a rectangular shape on thesurface 11 of thefirst substrate 10. Other configurations are basically the same as those of the first coil pattern CP1 illustrated inFIG. 6 , so the same reference numerals are given to the same elements, and overlapping description will be omitted. - The fourth turn T4 is disposed between the second and third turns T2 and T3. Assuming that the terminal electrodes E1 and E2 are the start and end points, respectively, the first coil pattern CP1 is wound proceeding in the following order: a part of the third turn T3→fourth turn T4→second turn T2→first turn T1→the remaining part of the third turn T3. The opening width of the fourth turn T4 in the x-direction is X4, and that in the y-direction is Y4. The opening width X4 is smaller than the opening width X3 of the third turn T3 and larger than the opening width X2 of the second turn T2 (X3>X4>X2). The opening width Y4 is smaller than the opening width Y3 of the third turn T3 and larger than the opening width Y2 of the second turn T2 (Y3>Y4>Y2). The opening width Y4 of the fourth turn T4 in the y-direction is smaller than the opening width X4 thereof in the x-direction (Y4<X4). That is, when the x- and y-directions are defined as the horizontal and vertical directions, respectively, the fourth turn T4 has a horizontally long rectangular shape like the third turn T3.
- The fourth turn T4 has
sections sections sections sections sections sections sections sections - Using the thus configured first coil pattern CP1 increases inductance to thereby improve communication characteristics. Further, the
sections sections placement surface 3 is offset in the x-direction as illustrated inFIGS. 2B and 2C . -
FIG. 12 is a schematic plan view illustrating the pattern shape of the first coil pattern CP1 according to a second modification. - The first coil pattern CP1 according to the second modification illustrated in
FIG. 12 differs from the first coil pattern CP1 illustrated inFIG. 11 in the planar shape of the fourth turn T4. Other configurations are basically the same as those of the first coil pattern CP1 illustrated inFIG. 11 , so the same reference numerals are given to the same elements, and overlapping description will be omitted. - In the second modification, the
sections sections section 83 has astraight line sections straight line sections straight line section 832 connected to thestraight line section 830 and linearly extending in the x-direction, a thirdstraight line section 833 connected to thestraight line section 831 and linearly extending in the x-direction, and a firststraight line section 834 connecting the second and thirdstraight line sections section 84 hasstraight line sections 840 and 841 linearly extending in the y-direction and a protruding section A2 positioned between thestraight line sections 840 and 841 and bulging outside in the x-direction. The protruding section A2 has a secondstraight line section 842 connected to thestraight line section 840 and linearly extending in the x-direction, a thirdstraight line section 843 connected to the straight line section 841 and linearly extending in the x-direction, and a firststraight line section 844 connecting the second and thirdstraight line sections - With the above configuration, a distance D6 b in the x-direction between the section 53 (54) of the second turn T2 and the first straight line section 834 (844) of the fourth turn T4 is larger than a distance D6 a in the x-direction between the section 53 (54) of the second turn T2 and the
straight line sections 830, 831 (840, 841) of the fourth turn T4 (D6 b>D6 a). Further, when a seventh distance in the x-direction between the first straight line section 834 (844) of the protruding section A1 (A2) and the section 63 (64) of the third turn T3 extending in the y-direction is defined as D7, the seventh distance D7 is smaller than the first distance D1. - Using the thus configured first coil pattern CP1 allows communication to be properly performed even when the position of an antenna coil as a communication target is displaced from the center in the y-direction. This allows communication with an antenna coil RX1 incorporated in the smartphone S1. Further, when an IC card having a wireless communication function is provided between the
placement surface 3 of thehousing 2 and the smartphone S1, detection of the IC card becomes possible. When the IC card is actually detected, wireless power transmission using the second coil pattern CP2 is stopped, whereby breakage of the IC card can be prevented. In addition, since the seventh distance D7 is smaller than the first distance D1, it is possible to further improve communication characteristics when the position of the smartphone S1 on theplacement surface 3 is offset in the x-direction as illustrated inFIGS. 2B and 2C . - While the preferred embodiment of the present disclosure has been described, the present disclosure is not limited to the above embodiment, and various modifications may be made within the scope of the present disclosure, and all such modifications are included in the present disclosure.
- The technology according to the present disclosure includes the following configuration examples but not limited thereto.
- An antenna module according to the present disclosure has a first coil pattern including at least first, second, and third turns. The first turn is positioned in the opening of the second turn, and the second turn is positioned in the opening of the third turn. The first and second turns each have an opening width larger in a first direction than in a second direction perpendicular to the first direction. A first distance between the first and second turns in the second direction is smaller than a second distance between the second and third turns in the second direction, a third distance between the first and second turns in the first direction is smaller than the first distance, and a fourth distance between the second and third turns in the first direction is smaller than the second distance. The third turn has an opening width larger in the second direction than in the first direction. With this configuration, it is possible to extend a communicable range in the second direction with a small number of turns while improving communication characteristics at substantially the center in the second direction.
- The first coil pattern may further include a fourth turn positioned between the second and third turns. This increases inductance to allow improvement in communication characteristics. In this case, a fifth distance between the fourth and third turns in the second direction may be smaller than a sixth distance between the fourth and second turns in the second direction. This allows communication to be properly performed even when a communication target device is significantly offset in the second direction.
- A part of the fourth turn that extends in the first direction may include a protruding section, the distance in the second direction between the second turn extends in the first direction and the fourth turn extends in the first direction increases at the protruding section. This allows communication to be properly performed even when a communication target device is offset in the first direction. In this case, the protruding section may have a first straight line section extending in the first direction and a second straight line section extending in the second direction. This makes it possible to improve communication characteristics at substantially the center in the first direction while extending a communicable range in the second direction. Further, a seventh distance in the second direction between the first straight line section of the protruding section and a part of the third turn that extends in the first direction may be smaller than the first distance. This allows further improvement in communication characteristics when a communication target device is significantly offset in the second direction.
- The antenna module according to the present disclosure may further include a second coil pattern overlapping the first coil pattern as viewed in the coil axis direction of the first coil pattern. This makes it possible to perform wireless power transmission in addition to communication based on NFC technology or the like. In this case, the second coil pattern may overlap the first coil pattern such that the first and second directions thereof are the short side direction and the long side direction, respectively. This allows power transmission to be properly performed even when a charging target device is significantly offset in the second direction.
- The antenna module according to the present disclosure may further include a third coil pattern disposed at one side of the first coil pattern in the second direction so as not to overlap the first coil pattern as viewed in the coil axis direction. This allows communication to be properly performed in both the cases where an antenna coil provided in a communication target device is disposed at substantially the center in the second direction and where it is disposed at the end portion in the second direction. In this case, the antenna module may further include a fourth coil pattern disposed at the other side of the first coil pattern in the second direction so as not to overlap the first coil pattern as viewed in the coil axis direction. This allows communication to be properly performed even when the antenna coil disposed at the end portion in the second direction is rotated by 180° in the second direction.
- The first and third coil patterns may be connected in parallel. This allows the first and third coil patterns to function independently of each other.
- The height position of the third coil pattern in the coil axis direction may be lower than the height position of the first coil pattern in the coil axis direction. This can suppress coupling between the first and third coil patterns. In this case, the antenna module may further include a magnetic sheet disposed on the side opposite to the first coil pattern with respect to the second coil pattern, and the height position of the third coil pattern in the coil axis direction may be lower than the height position of the surface of the magnetic sheet that faces the second coil pattern. This can further suppress coupling between the first and third coil patterns.
- A wireless power transmission device according to the present disclosure may include the above-described antenna module, a communication circuit connected to the first coil pattern, and a power transmission circuit connected to the second coil pattern. This makes it possible to perform wireless power transmission and NFC-based communication.
Claims (14)
1. An antenna module comprising a first coil pattern including at least first, second, and third turns,
wherein the first turn is positioned in an opening of the second turn,
wherein the second turn is positioned in an opening of the third turn,
wherein each of the first and second turns has an opening width larger in a first direction than in a second direction perpendicular to the first direction,
wherein a first distance between the first and second turns in the second direction is smaller than a second distance between the second and third turns in the second direction,
wherein a third distance between the first and second turns in the first direction is smaller than the first distance,
wherein a fourth distance between the second and third turns in the first direction is smaller than the second distance, and
wherein the third turn has an opening width larger in the second direction than in the first direction.
2. The antenna module as claimed in claim 1 , wherein the first coil pattern further includes a fourth turn positioned between the second and third turns.
3. The antenna module as claimed in claim 2 , wherein a fifth distance between the fourth and third turns in the second direction is smaller than a sixth distance between the fourth and second turns in the second direction.
4. The antenna module as claimed in claim 2 ,
wherein a part of the fourth turn that extends in the first direction includes a protruding section, and
wherein a distance in the second direction between the second turn extends in the first direction and the fourth turn extends in the first direction increases at the protruding section.
5. The antenna module as claimed in claim 4 , wherein the protruding section has a first straight line section extending in the first direction and a second straight line section extending in the second direction.
6. The antenna module as claimed in claim 5 , wherein a seventh distance in the second direction between the first straight line section of the protruding section and a part of the third turn that extends in the first direction is smaller than the first distance.
7. The antenna module as claimed in claim 1 , further comprising a second coil pattern overlapping the first coil pattern as viewed in a coil axis direction of the first coil pattern.
8. The antenna module as claimed in claim 7 , wherein the second coil pattern overlaps the first coil pattern such that the first and second directions thereof are the short side direction and the long side direction, respectively.
9. The antenna module as claimed in claim 7 , further comprising a third coil pattern disposed at one side of the first coil pattern in the second direction so as not to overlap the first coil pattern as viewed in the coil axis direction.
10. The antenna module as claimed in claim 9 , further comprising a fourth coil pattern disposed at another side of the first coil pattern in the second direction so as not to overlap the first coil pattern as viewed in the coil axis direction.
11. The antenna module as claimed in claim 9 , wherein the first and third coil patterns are connected in parallel.
12. The antenna module as claimed in claim 9 , wherein a height position of the third coil pattern in the coil axis direction is lower than a height position of the first coil pattern in the coil axis direction.
13. The antenna module as claimed in claim 12 , further comprising a magnetic sheet disposed on a side opposite to the first coil pattern with respect to the second coil pattern,
wherein a height position of the third coil pattern in the coil axis direction is lower than a height position of a surface of the magnetic sheet that faces the second coil pattern.
14. A wireless power transmission device comprising:
an antenna module comprising a first coil pattern and a second coil pattern overlapping the first coil pattern as viewed in a coil axis direction of the first coil pattern;
a communication circuit connected to the first coil pattern; and
a power transmission circuit connected to the second coil pattern,
wherein the first coil pattern includes at least first, second, and third turns,
wherein the first turn is positioned in an opening of the second turn,
wherein the second turn is positioned in an opening of the third turn,
wherein each of the first and second turns has an opening width larger in a first direction than in a second direction perpendicular to the first direction,
wherein a first distance between the first and second turns in the second direction is smaller than a second distance between the second and third turns in the second direction,
wherein a third distance between the first and second turns in the first direction is smaller than the first distance,
wherein a fourth distance between the second and third turns in the first direction is smaller than the second distance, and
wherein the third turn has an opening width larger in the second direction than in the first direction.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2022-031038 | 2022-03-01 | ||
JP2022031038A JP2023127322A (en) | 2022-03-01 | 2022-03-01 | Antenna module and wireless power transmission device equipped with the same |
Publications (1)
Publication Number | Publication Date |
---|---|
US20230283112A1 true US20230283112A1 (en) | 2023-09-07 |
Family
ID=87836275
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US18/173,304 Pending US20230283112A1 (en) | 2022-03-01 | 2023-02-23 | Antenna module and wireless power transmission device having the same |
Country Status (3)
Country | Link |
---|---|
US (1) | US20230283112A1 (en) |
JP (1) | JP2023127322A (en) |
CN (1) | CN116706512A (en) |
-
2022
- 2022-03-01 JP JP2022031038A patent/JP2023127322A/en active Pending
-
2023
- 2023-02-23 US US18/173,304 patent/US20230283112A1/en active Pending
- 2023-03-01 CN CN202310185076.5A patent/CN116706512A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
CN116706512A (en) | 2023-09-05 |
JP2023127322A (en) | 2023-09-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10511089B2 (en) | Antenna device and electronic apparatus | |
US9905926B2 (en) | Antenna device and wireless communication apparatus | |
US9991583B2 (en) | Antenna apparatus and communication terminal instrument | |
EP2811656B1 (en) | Antenna device and wireless communication device | |
US9583834B2 (en) | Antenna module and radio communication device | |
CN204335178U (en) | Antenna assembly and radio communication device | |
CN106058474B (en) | Antenna device and communication terminal device | |
EP2424041A1 (en) | Antenna apparatus and resonant frequency setting method of same | |
US20140203991A1 (en) | Antenna device and communication terminal device | |
CN103703617A (en) | Magnetic antenna, antenna device, and electronic equipment | |
US20200203831A1 (en) | Antenna device and electronic apparatus | |
CN112018499B (en) | Antenna device and IC card provided with same | |
US20190393604A1 (en) | Antenna device, communication system, and electronic apparatus | |
CN206180118U (en) | Antenna device, and electronic device | |
US20220352752A1 (en) | Coil module and wireless power transmission device | |
US20230283112A1 (en) | Antenna module and wireless power transmission device having the same | |
US11715976B2 (en) | Coil component | |
JP6612657B2 (en) | Coil assembly for non-contact charging | |
CN110830072A (en) | Radio frequency duplexer and mobile terminal based on PCB | |
US11831292B2 (en) | LC composite component and communication terminal device | |
US20220374673A1 (en) | Antenna device and wireless power transmission device having the same | |
CN117673758A (en) | Antenna device and wireless power transmission device provided with same | |
US20220375682A1 (en) | Coil component and wireless power transmission device having the same | |
JP2023127321A (en) | Antenna module and wireless power transmission device equipped with the same |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: TDK CORPORATION, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KAJIKIYA, SHOMA;CHIYO, NORITAKA;REEL/FRAME:062787/0928 Effective date: 20230117 |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION |